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<code>this.$nextTick(回调函数)</code>在下一次<code>DOM</code>更新结束后执行其指定的回调
什么时候用：当改变数据后，要基于更新后的<code>新DOM</code>进行某些操作时，要在<code>nextTick</code>所指定的回调函数中执行
使用 <code>$nextTick</code>优化 Todo-List</p> <p><code>src/components/MyItem.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>li</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>label</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>checkbox<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:checked</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todo.done<span class="token punctuation">&quot;</span></span> <span class="token attr-name">@change</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>handleCheck(todo.id)<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!todo.isEdit<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>{{ todo.title }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text<span class="token punctuation">&quot;</span></span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todo.isEdit<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todo.title<span class="token punctuation">&quot;</span></span>
        <span class="token attr-name">@blur</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>handleBlur(todo, $event)<span class="token punctuation">&quot;</span></span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>inputTitle<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>label</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>btn btn-danger<span class="token punctuation">&quot;</span></span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>handleDelete(todo.id)<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>删除<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!todo.isEdit<span class="token punctuation">&quot;</span></span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>btn btn-edit<span class="token punctuation">&quot;</span></span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>handleEdit(todo)<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
      编辑
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>li</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">&quot;MyItem&quot;</span><span class="token punctuation">,</span>
  
  <span class="token literal-property property">props</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">&quot;todo&quot;</span><span class="token punctuation">]</span><span class="token punctuation">,</span>	<span class="token comment">// 声明接收todo</span>
  <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token function">handleCheck</span><span class="token punctuation">(</span><span class="token parameter">id</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>		<span class="token comment">// 勾选or取消勾选</span>
      <span class="token comment">// 通知App组件将对应的todo对象的done值取反</span>
      <span class="token comment">// this.checkTodo(id)</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span>$bus<span class="token punctuation">.</span><span class="token function">$emit</span><span class="token punctuation">(</span><span class="token string">&quot;checkTodo&quot;</span><span class="token punctuation">,</span> id<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token function">handleDelete</span><span class="token punctuation">(</span><span class="token parameter">id</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>	<span class="token comment">// 删除</span>
      <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">confirm</span><span class="token punctuation">(</span><span class="token string">&quot;确定删除吗？&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// 通知App组件将对应的todo对象删除</span>
        <span class="token comment">// this.deleteTodo(id)</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>$bus<span class="token punctuation">.</span><span class="token function">$emit</span><span class="token punctuation">(</span><span class="token string">'deleteTodo'</span><span class="token punctuation">,</span>id<span class="token punctuation">)</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token function">handleEdit</span><span class="token punctuation">(</span><span class="token parameter">todo</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>	<span class="token comment">// 编辑</span>
      <span class="token keyword">if</span> <span class="token punctuation">(</span>todo<span class="token punctuation">.</span><span class="token function">hasOwnProperty</span><span class="token punctuation">(</span><span class="token string">&quot;isEdit&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        todo<span class="token punctuation">.</span>isEdit <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
      <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">$set</span><span class="token punctuation">(</span>todo<span class="token punctuation">,</span> <span class="token string">&quot;isEdit&quot;</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token punctuation">}</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">$nextTick</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>$refs<span class="token punctuation">.</span>inputTitle<span class="token punctuation">.</span><span class="token function">focus</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token function">handleBlur</span><span class="token punctuation">(</span><span class="token parameter">todo<span class="token punctuation">,</span> e</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>	<span class="token comment">// 失去焦点回调（真正执行修改逻辑）</span>
      todo<span class="token punctuation">.</span>isEdit <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
      <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>e<span class="token punctuation">.</span>target<span class="token punctuation">.</span>value<span class="token punctuation">.</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token keyword">return</span> <span class="token function">alert</span><span class="token punctuation">(</span><span class="token string">&quot;输入不能为空！&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span>$bus<span class="token punctuation">.</span><span class="token function">$emit</span><span class="token punctuation">(</span><span class="token string">&quot;updateTodo&quot;</span><span class="token punctuation">,</span> todo<span class="token punctuation">.</span>id<span class="token punctuation">,</span> e<span class="token punctuation">.</span>target<span class="token punctuation">.</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181442080.png" alt="image.png"></p> <h2 id="_3-13-过渡与动画"><a href="#_3-13-过渡与动画" class="header-anchor">#</a> 3.13. 过渡与动画</h2> <p><code>Vue</code>封装的过度与动画：在插入、更新或移除<code>DOM</code>元素时，在合适的时候给元素添加样式类名</p> <p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181442864.png" alt="image.png"></p> <p>写法</p> <ol><li>准备样式
<ul><li>元素进入的样式
<ul><li><code>v-enter</code>		 	进入的起点</li> <li><code>v-enter-active</code>	进入过程中</li> <li><code>v-enter-to</code>	 	进入的终点</li></ul></li> <li>元素离开的样式
<ul><li><code>v-leave</code>			离开的起点</li> <li><code>v-leave-active</code>	离开过程中</li> <li><code>v-leave-to</code>		离开的终点</li></ul></li></ul></li> <li>使用<code>&lt;transition&gt;</code>包裹要过度的元素，并配置<code>name</code>属性，此时需要将上面样式名的<code>v</code>换为<code>name</code></li> <li>要让页面一开始就显示动画，需要添加<code>appear</code></li></ol> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>hello<span class="token punctuation">&quot;</span></span> <span class="token attr-name">appear</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">.hello-enter-active</span><span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> hello 0.5s linear<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token selector">.hello-leave-active</span><span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> hello 0.5s linear reverse<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token atrule"><span class="token rule">@keyframes</span> hello</span> <span class="token punctuation">{</span>
    <span class="token selector">from</span><span class="token punctuation">{</span>
      <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>-100%<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token selector">to</span><span class="token punctuation">{</span>
      <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>0px<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br></div></div><ol start="4"><li>备注：若有多个元素需要过度，则需要使用<code>&lt;transition-group&gt;</code>，且每个元素都要指定<code>key</code>值</li></ol> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition-group</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>hello<span class="token punctuation">&quot;</span></span> <span class="token attr-name">appear</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>尚硅谷！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition-group</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ol start="5"><li>第三方动画库<code>Animate.css</code></li></ol> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition-group</span> <span class="token attr-name">appear</span>
          <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__animated animate__bounce<span class="token punctuation">&quot;</span></span>
          <span class="token attr-name">enter-active-class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__swing<span class="token punctuation">&quot;</span></span>
          <span class="token attr-name">leave-active-class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__backOutUp<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>尚硅谷！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition-group</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p><code>src/App.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
	<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
		<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Test</span><span class="token punctuation">/&gt;</span></span>
		<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Test2</span><span class="token punctuation">/&gt;</span></span>
		<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Test3</span><span class="token punctuation">/&gt;</span></span>
	<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
	<span class="token keyword">import</span> Test <span class="token keyword">from</span> <span class="token string">'./components/Test'</span>
	<span class="token keyword">import</span> Test2 <span class="token keyword">from</span> <span class="token string">'./components/Test2'</span>
	<span class="token keyword">import</span> Test3 <span class="token keyword">from</span> <span class="token string">'./components/Test3'</span>

	<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
		<span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'App'</span><span class="token punctuation">,</span>
		<span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span>Test<span class="token punctuation">,</span>Test2<span class="token punctuation">,</span>Test3<span class="token punctuation">}</span><span class="token punctuation">,</span>
	<span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br></div></div><p><code>src/components/test.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow = !isShow<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>显示/隐藏<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>hello<span class="token punctuation">&quot;</span></span> <span class="token attr-name">appear</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'Test'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">isShow</span><span class="token operator">:</span><span class="token boolean">true</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">h1</span><span class="token punctuation">{</span><span class="token property">background-color</span><span class="token punctuation">:</span> orange<span class="token punctuation">;</span><span class="token punctuation">}</span>

  <span class="token selector">.hello-enter-active</span><span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> atguigu 0.5s linear<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token selector">.hello-leave-active</span><span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> atguigu 0.5s linear reverse<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token atrule"><span class="token rule">@keyframes</span> atguigu</span> <span class="token punctuation">{</span>
    <span class="token selector">from</span><span class="token punctuation">{</span><span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>-100%<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">}</span>
    <span class="token selector">to</span><span class="token punctuation">{</span><span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>0px<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br></div></div><p><code>src/compontents/test2</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow = !isShow<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>显示/隐藏<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition-group</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>hello<span class="token punctuation">&quot;</span></span> <span class="token attr-name">appear</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>尚硅谷！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition-group</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'Test'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">isShow</span><span class="token operator">:</span><span class="token boolean">true</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">h1</span> <span class="token punctuation">{</span>
    <span class="token property">background-color</span><span class="token punctuation">:</span> orange<span class="token punctuation">;</span>
    <span class="token comment">/* transition: 0.5s linear; */</span>
  <span class="token punctuation">}</span>
  <span class="token comment">/* 进入的起点、离开的终点 */</span>
  <span class="token selector">.hello-enter,.hello-leave-to</span> <span class="token punctuation">{</span>
    <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>-100%<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token selector">.hello-enter-active,.hello-leave-active</span><span class="token punctuation">{</span>
    <span class="token property">transition</span><span class="token punctuation">:</span> 0.5s linear<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token comment">/* 进入的终点、离开的起点 */</span>
  <span class="token selector">.hello-enter-to,.hello-leave</span> <span class="token punctuation">{</span>
    <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>0<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181446750.png" alt="img"></p> <p><code>src/components/test3</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow = !isShow<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>显示/隐藏<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition-group</span> <span class="token attr-name">appear</span>
                      <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__animated animate__bounce<span class="token punctuation">&quot;</span></span>
                      <span class="token attr-name">enter-active-class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__swing<span class="token punctuation">&quot;</span></span>
                      <span class="token attr-name">leave-active-class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>animate__backOutUp<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>!isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>1<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-show</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>isShow<span class="token punctuation">&quot;</span></span> <span class="token attr-name">key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>2<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>尚硅谷！<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition-group</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> <span class="token string">&quot;animate.css&quot;</span>
  
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">&quot;Test&quot;</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">isShow</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">h1</span> <span class="token punctuation">{</span><span class="token property">background-color</span><span class="token punctuation">:</span> orange<span class="token punctuation">;</span><span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br></div></div><p><strong>使用动画优化 Todo-List</strong></p> <p><code>src/components/MyList.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>ul</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todo-main<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>transition-group</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todo<span class="token punctuation">&quot;</span></span> <span class="token attr-name">appear</span><span class="token punctuation">&gt;</span></span>
      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>MyItem</span> <span class="token attr-name">v-for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todoObj of todoList<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:key</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todoObj.id<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:todoObj</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>todoObj<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>transition-group</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>ul</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> MyItem <span class="token keyword">from</span> <span class="token string">&quot;./MyItem.vue&quot;</span><span class="token punctuation">;</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">&quot;MyList&quot;</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> MyItem <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">props</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">&quot;todoList&quot;</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token comment">/*main*/</span>
  <span class="token selector">.todo-main</span> <span class="token punctuation">{</span><span class="token property">margin-left</span><span class="token punctuation">:</span> 0px<span class="token punctuation">;</span><span class="token property">border</span><span class="token punctuation">:</span> 1px solid #ddd<span class="token punctuation">;</span><span class="token property">border-radius</span><span class="token punctuation">:</span> 2px<span class="token punctuation">;</span><span class="token property">padding</span><span class="token punctuation">:</span> 0px<span class="token punctuation">;</span><span class="token punctuation">}</span>
  <span class="token selector">.todo-empty</span> <span class="token punctuation">{</span><span class="token property">height</span><span class="token punctuation">:</span> 40px<span class="token punctuation">;</span><span class="token property">line-height</span><span class="token punctuation">:</span> 40px<span class="token punctuation">;</span><span class="token property">border</span><span class="token punctuation">:</span> 1px solid #ddd<span class="token punctuation">;</span><span class="token property">border-radius</span><span class="token punctuation">:</span> 2px<span class="token punctuation">;</span>
    <span class="token property">padding-left</span><span class="token punctuation">:</span> 5px<span class="token punctuation">;</span><span class="token property">margin-top</span><span class="token punctuation">:</span> 10px<span class="token punctuation">;</span><span class="token punctuation">}</span>

  <span class="token selector">.todo-enter-active</span> <span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> atguigu 0.5s linear<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token selector">.todo-leave-active</span> <span class="token punctuation">{</span>
    <span class="token property">animation</span><span class="token punctuation">:</span> atguigu 0.5s linear reverse<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

  <span class="token atrule"><span class="token rule">@keyframes</span> atguigu</span> <span class="token punctuation">{</span>
    <span class="token selector">from</span> <span class="token punctuation">{</span>
      <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>100%<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token selector">to</span> <span class="token punctuation">{</span>
      <span class="token property">transform</span><span class="token punctuation">:</span> <span class="token function">translateX</span><span class="token punctuation">(</span>0px<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
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